Elevator



Patented June 5, 1.923.

narran JOSEPH G. CORNELL, OF BROOKLYN, NEW YORK.

nnnvaron.

Application led July 1,

To all whom t may concer/n.'

Be it known that I, JOSEPH G. ConNnLr., a citizeniof the United States, and a resident of the city of New York, borough of Brooklyn, in the county of Kings and State of New York, have invented new and useful Improvements in Elevators, of which the following is a full, clear, and exact description.

` This invention relates to elevators and more particularly to elevators for mounting in floors or sidewalks.

The general object of this invention is the provision of a cheap; simple and durable elevator of the lazy tongs type provided with balancing means that may be located below the elevator cage and which is attached to the lazy tongs system.

A further object 'of the invention is the provision of a lazy tongs elevator provided with equalizers for adjusting the operating chains on the driving mechanism,

These objects are accomplished by slidably mounting in a frame a cage and lazy tongs system, and attaching tothe lower members of the lazy tongs system chains which are positioned over the sprocket wheels fixed to a drivenl shaft, and mounting on the ends of the chains equalizers and balancing means.

These and other objects of the invention will be more clearly understood from the following detailed description and accompanying drawings, in which- Figure 1 is a section along the line 1-1, Figure 2;

Figure 2 is a front elevation;

Figure 3 is a section along the line 3-3, Figure 1;

Figure 4 is a section along the line 4 4, Figure 1.

Referring to the above-mentioned dra-wings, a frame, consisting of rails and 11 connected at the top by plates 12 and at the bottom by a shaft 13, is shown. This frame is mounted on a foundation 14. A plurality of braces 15 are provided in conjunction with each rail to firmly support it in a vertical position. Extending inward from the rails 10 and 11 are flanges 16 and 17 with which a plurality of shoes 18 mounted on a cage 19 slidably engage. .t

A lazy tongs system is built up from two sets of hinged bars 2O and 21, pivotally mountedv at their centers onv shafts 22 Mounted on the ends of the shafts 22 lare 1922. Serial No. 572,171.

slices 23 that slidably engage the flanges 16 and 17 of the rails 10 and 11. The shoes mounted on the lower shaft 22 are not slidably mounted on the flanges 16 and 17 but are rigidly connected thereto, supporting the lowest shaft 22 in the frame. The joints connecting the members of the two different sets and the mounting on the shafts 22 would be preferably similar to those set forth in mycopending application, Serial No.

571,402, filed by me June 2e, i922. At-

tached to the ends of the members 2O and 21 are links 24 which serve as a means for connecting chains or the like to the lower ends of the bar members.

Rotatably mounted in bearing-s 25 and 26, .f

ment with the lowest members of the lazy tongs system, and chains which are connected to the links 24 are positioned on the sprocket wheels 29.' The gear 28, mounted near the center of the shaft 13, meshes with a pinion 31 fixed to an axle 32 which is rotatably mounted in the frame 33. Another worin gear 34 is fixed to the axle 32 and meshes with a. worm 35, The shaft 36 on which the worm is mounted is supported by the frame 33. A coupling 37 is provided for connecting the shaft 38 on a motor 39 to the shaft 36 rvon which the -worm 35 is mounted. I

A frame 40 is mounted on the base 14 and retained in spaced relation from the rails 10 and 11 by means of plates 41. Mounted on the frame 40 are bearings 42 in which a shaft 43 is rotatably mounted. Fixed to the shaft 43 are a plurality of sprocket wheels 44 mounted in alinement with the sprocket wheels 29 on the shaft 13. The chains 30 after passing around the sprocket wheels 29 pass over the sprocket wheels 44 and extend downward, forming loops, as s liown in Figaure 1, the ends of the chains being connected to l`shaped plates 45 which are pivotally connected to the frame 40 at 46. A weight 47 is attached to a shaft 48 on which four sprocket wheels 49 are rotatably mounted. The weight 47 is supported in the loops of the chains 30 by engaging the sprocket wheels 49 with the chains. Thus the weight 47 moves upland down as the chains 30 are moved back and forward overthe sprocket wheels 44.'

llO

The operation of this device is as follows:

When the lazy tongs system is collapsed it rests on the lowest shaft 22 which is attached to the railslzt) and l1 by pins The cage 19'is supported on the lazy tongs system by means of clamps 50. When it is desired to raise the cage 19,l the motor 39 is set in motion and through the worm 35, worm gear 3.1i, shaft 32, pinion 3l, gear 28, the shaft 13 and sprocket wheels 29 are operated. i .If the shaft andsprocliet wheels are rotated clockwise, as seen in Figure the lower ends of the mem-bers @Gand 2l are drawn together thus expanding the -lazy tongs system and sliding 'the cage '19 upward along the rails 'l0' and' ll.. As the' sha-ft 15? and sprocket wheel-s 29 are rotated clockwise, as seen in Figure l, chains 30 pass overthe sprocket wheels loweringfftl'ie weight ffl?,

which is carried by the shaft i8 and sprocket wheels 49, the sprocket wheels 49'" traveling on the chains 30. This weight serves to balance the lazytongs systemand the cage 19. If the chains 30 are notofpropcrlength to `all engage the sprocket wheels 49, the-equalizers l5 rotate on their pivot points i6 and thusv the weight is evenly carried on all the chains. ln order to 'lower the cage i9, the Vsprocket. wheels 219 andshaft 123 are rotated countercloclrwisey by reversing the motor 39.

v twill be -seen in the` figures that the balancing apparatus isf located below the lowest shaft 22 which limits the downward movement ofthe cage 191'.. Thus an elevator of Athe llazy tongstype for installation in sidewalks or floors has been: provided with a.

balancing means associated with the lifting means and'. which is located beneath the cage. I wouldstatein` conclusion that while the illustrated example constitutes "a practical embodiment of theinvention-I do, not .limit myself strictlyv tothe exact details herein illustrated` since manifestlythe same can be considerably Varied without departing from .they Spirit' of theinventionasdefined in the appended claims.;

i "Claims: y v

1i. Annelevatoncomprismg a frame, a lazy tongs system mounted in the frame, flexible ymembers attached to the lower' bars-of the lazy' tongs system, a balancing weight attached to the flexible members, and. means for operating the lazy tongs system through the flexible members. l

2.. An, elevator, comprising a frame, a

cagemountedin the frame, a lazy tongs sysvtem mounted in the frame for operating the .cage, flexible members attached to the -lower bars otthelazyf tongs system, a weight carried `by theflexible members for-balancingthe lazy ton-gs: system and: cage, means for engaging thefflexible members, and means for driving said engaging means to operate the lazy tongs "system through the flexible members.`

3. An elevator, comprising a frame, .a cage anda lazy tongs `system mounted in the. frame, flexible members attached to the lower bars of the lazy tongs system, a weight carried by the flexible members'for balancing thef'lazy tongs system,A cage equalizers attached to the flexible members to compensate for the difference in length of said flexible members, and means for operating the lazy tongs system throu'ghsaid flexible members.

4L.' An elevator, comprising a framaalazy tongs system and cageA mounted inthe gaging means to operate the lazy tongs sys-y tem through said. flexible members,

5. Anl elevator, comprising a frame, a lazy tongs system and a `cagermeuntedin. the frame, a flexible member attached to each of the lowery bars of the lazy tongs system, a weight n carried byv the flexible members serv.- ing as a balancing means, squali-zere attached' to .the flexible members to take up the differences in lengthfof the same, and means Lfor operating the lazy tongs system through the .flexible members. i v

6'. In a lazy tongs elevator including flexible members attached to the ends of the lower bars and means` for operating theI lazy tongs system through said flexible members,

a balancing .weight carried by saidflexible ,rotatably mounted` in lsaid' frame,*meansv for. operating said- .shaft and chain. vwheels to operate the 'lazy tongssystem. through the chains, "and a balancing weight carried by the chains.

8. An elevator, comprising a frame, a

lcage and a lazy .tongs system mounted in the frame, a shaft having a plurality `ofsprocket wheels fixed thereon rotatably mounted in the Jframe, chains attached to the lower ends of the bars, of the lazy tongs system and p.osi.tioned.abouty .saidy sprocket ywheels, equalizers 'attached to the. chains 'for adjustingT them on the sprocket 'wheel's,-

and .balancing means `associated with said chains.. j y 9. An elevator, comprising frame, a lazy tongs and cagev mounted inthefframe, -a shaft having aplurality of chain wheels fixed thereto rotatably mounted in .the

frame, means vfor `driving said shaft-con- .nected thereto aplurality of chains attached to the lowerv bars of; said lazy tongs system )and positioned about said-chain wheels a second shaft having a pluralityof chain Wheels fixed thereon rotatably mounted on the frame and having the chains positioned about said chain Wheels, equalizers mounted in the frame and attached to the ends of the chains, the chains between said last-mentioned chain Wheels and equalizers forming loops, and a balancing Weight positioned in said loops.

10. A lazy tongs elevator of the classv described comprising a frame, a lazy tongs system and a cage mounted in said frame, v

chains attached to the lower bars of said lazy tongs system, a shaft having a plurality of chain wheels fixed thereon rotatably mounted in the frame, said chain Wheels engaging the chains, balancing means for the cage and lazy tongs system associated with the chains, equalizers for adjusting the chains on said chain Wheels attached to the ends of the chains, and means for driving the shaft carrying the chain said flexible members, and a balancing Weight carried by the flexible members.

13. In a lazy tongs elevator having flexible members for operating thelazy tongs, balancing means Comprising means for suspending loops in the flexible members, and a balancing Weight for riding in the loops.

14. In a lazy tongs elevator, means for operating the lazy tongs, comprising flexible members connected to the lazy tongs, means for operating the lazy tongs through said flexible members, a support over Which portions of said flexible members depend, and a balancing Weight carried by the depending portions of said fiexible members.

15. In a lazy tongs elevator, means for operating the lazy tongs, including flexible members connected to the lazy tongs, equalizers connected to the flexible members, means for forming depending loops in the flexible members, and a balancing Weight movably mounted in said loops.

16. A lazy tongs elevator comprising a frame, a cage slidably mounted in the frame, a lazy tongs for operating the cage, flexible members connected to the lazy tongs, equalizing members mounted on the frame and connectedI to the flexible members for adjusting the latter, means for operating the lazy tongs through the fiexible members, and a balancing Weight carried by the flexible members.

JOSEPH G. CORNELL. 

